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Geotimes August 2003 Megan Sever |
The Hawaiian hotspot debate: an update Most geologists have long thought that the Hawaiian Islands formed by the Pacific plate moving over a hotspot plume that sat fixed in the mantle; however, recent research suggests a moving hotspot could have been responsible. Still newer research has stirred a new round of debate. |
Geotimes April 2005 Sara Pratt |
New Dates Defy Fixed Hotspots A new study of two Pacific seamount chains with bends similar to the Hawaii-Emperor chain has found that the bends there formed up to 20 million years apart, challenging the fixed hotspot theory. |
Geotimes March 2003 Parks & Pinsker |
Geophenomena Conversations between volcanoes ... Bending thoughts about Hawaiian chain |
Geotimes September 2006 Carolyn Gramling |
Donald Forsyth: At Play in the Field Forsyth emphasizes that collaborating with students and other researchers is not only important to solving tough geological puzzles, but also is much of the fun. |
Geotimes June 2007 Hansen & Gramling |
Are Volcanoes Picky Eaters? New measurements of the concentrations of elements within magma suggest a volcano's food may be a complex recipe -- and that what kind of magma a volcano prefers may affect its physical features, including the size to which it can grow, according to new research |
Geotimes October 2006 Carolyn Gramling |
Strong Earthquake Shakes up Hawaii A magnitude-6.7 earthquake rumbled through the island chain of Hawaii, originating near Hawaii island, known as the "Big Island," according to the USGS. An aftershock with a magnitude of 6.0 followed seven minutes later. |
Chemistry World July 22, 2011 David Bradley |
Cracking diamonds reveals continental origins An analysis of the mineral inclusions in diamonds dredged up by eruptions from deep within the Earth has allowed scientists to get a handle on when the process of plate tectonics began. |
Geotimes January 2004 Naomi Lubick |
W. Jason Morgan: Geophysics guru honored The recipient of the National Medal of Science, an award for lifetime achievement, is considered by many to be the key architect of plate tectonic mechanics. |
Geotimes September 2003 Sara Pratt |
Zircons reveal mantle evolution A team of Finnish geologists has discovered 3.1 billion-year-old zircons in the Jormua ophiolite of eastern Finland. Although not the oldest zircons on Earth, the Jormua zircons are the oldest yet found in mantle rocks. Their discovery has given scientists a brief glimpse into the history of early plate tectonics. |
Geotimes July 2006 Carolyn Gramling |
Earth Soaks up Seawater Geologists have long thought that seawater does not travel very far through Earth's interior A new geochemical study, however, is challenging that notion, saying that traces of seawater exist deep inside the planet. |
Chemistry World July 30, 2009 James Urquhart |
Water linked to mantle oxidation US scientists have used an emerging technique to analyse minuscule samples of magma derived from the Earth's mantle in different tectonic environments and discovered a direct link between water content and the oxidation state of iron within the sample. |
Geotimes July 2006 Carolyn Gramling |
Afar From Close-up Powerful stresses in the crust lead to frequent earthquakes and volcanism in the Afar Depression of northeastern Ethiopia. Researchers now say that the source of this activity reveals a possible new connection in Earth's interior. |
Geotimes December 2003 Sara Pratt |
Ultraslow spreading centers In two of the deepest and most remote parts of the world, scientists have discovered a new class of "ultraslow" spreading ridge, where cold, solid slabs of mantle are being heaved to the surface to build new seafloor. |
Geotimes July 2005 Naomi Lubick |
Marcia McNutt: Oceangoing Geophysicist Marcia McNutt, president of the Monterey Bay Aquarium Research Institute, has been elected to the National Academy of Sciences for her scientific contributions to geophysics and understanding Earth's crust. |
Chemistry World May 28, 2014 Ian Randall |
Earth's earliest continent formed like Iceland The Earth's first continents may have formed in a geological setting similar to modern-day Iceland, according to the geochemical analysis of a newly discovered rock unit from Canada. |
Chemistry World May 24, 2012 Jon Evans |
Can magma crystals predict eruptions? Mineral crystals blasted out from volcanoes can provide a window into the powerful processes going on inside those volcanoes, say UK and German earth scientists. |
Geotimes February 2005 Joshua Zaffos |
Mid-Ocean Ridge Spread or Jam? Different spreading geologic ridges move at different rates, and new research may explain how changes in spreading rates affect heat distribution and crust development at the ridges, particularly the slow ones. |
Geotimes January 2007 Kathryn Hansen |
Eruptive Event Caught Red-Handed Researchers know that, in general, mid-ocean ridges are the site of periodic eruptive events that create new seafloor. At the East Pacific Rise, determining the seismic characteristics that lead up to eruptions could help researchers predict when and where along the trench future events are likely to occur. |
Wired December 2004 Erika Check |
Mysteries of the Deep The top 15 places to explore beneath the sea. |
Geotimes November 2006 Kathryn Hansen |
Crystals Heat up Volcanic Eruptions Key pressure and temperature information preserved inside tiny bubbles in lava is causing scientists to rethink previous assumptions about how magma behaves, and what might trigger eruptions. |
Geotimes November 2005 Naomi Lubick |
Large Quake, Small Tsunami for Japan A large earthquake several hundred kilometers offshore Japan triggered a tsunami warning and a subsequent small tsunami. Three or four large events have occurred on this subduction fault over the past several centuries, as the Pacific plate slowly presses westward under Japan. |
Geotimes September 2007 Elizabeth Quill |
Earth's Heat Buoys up Its Crust New research suggests that without the heat in Earth's crust and upper mantle creating elevation, much of North America would be underwater. |
BusinessWeek March 17, 2011 Jonathan Tirone |
Searching for Clues Along the Ring of Fire Japan's earthquake will generate aftershocks for years, producing data that may yield insights about the quake-prone Pacific Rim. |
Geotimes May 2007 Kathryn Hansen |
Deep Earth May Hold an Ocean Earth's deep interior, more than 1,000 kilometers below the surface in the mantle, could prove to be a watery place. That's the conclusion researchers drew from an anomaly uncovered by the first global map of Earth's lower mantle, using a new type of seismic analysis. |
Geotimes July 2005 Naomi Lubick |
Monitoring the Most Dangerous U.S. Volcanoes An assessment of the risks and hazards associated with volcanoes has led U.S. researchers to suggest a plan of action for avoiding future disasters, including threats to airplanes and populations living around these features. |
Geotimes May 2006 Carolyn Gramling |
Indonesian Volcano Ready to Erupt Spewing hot clouds of gas and bulging with lava, Mount Merapi, one of Indonesia's most active volcanoes, has rumbled to life, and a full-scale eruption is imminent, local officials warn. |
Geotimes July 2004 Sara Pratt |
Core Compositions Scientists are working to explain the differences in composition between Earth and Mars. |
Geotimes November 2007 Kathryn Watts |
Yellowstone and Heise: Supervolcanoes That Lighten Up Beneath Yellowstone, and driving many of its beloved features such as the geyser Old Faithful, lies a churning chamber of magma that has erupted before and may erupt again. |
Geotimes May 2004 Megan Sever |
Today's Volcano Risks Active volcanoes pose a threat to commercial aircraft, engendering course diversions around potential danger spots. |
Geotimes June 2006 Megan Sever |
Plate Shifts in the Pacific Northwest The far northern section of the Sumatra-style subduction zone in the Pacific Northwest could be transforming into more of a San Andreas-style seismic zone, according to new research. This geologic reorganization could have implications for the region's earthquake risk. |
Geotimes February 2004 Naomi Lubick |
Pursuing plumes Geophysicists recently presented improved methods for imaging mantle plumes, providing the strongest evidence yet that some plumes extend all the way down to the coremantle boundary. |
Geotimes April 2006 Kathryn Hansen |
Deep Sediments, Strong Quakes The surprising strength of the earthquake that triggered the 2004 Sumatran tsunami urged seismologists to discover triggers that lead up to these events. New models show responsibility may rest on sediments than can collect kilometers deep at the junctions of tectonic plates. |
High on Adventure April 2008 Vicki Andersen |
Creation of the cascade mountains The 700-mile stretch of playground known as the Cascade Mountain range is comprised of more than a dozen major peaks. |
Geotimes November 2007 Carolyn Gramling |
How Does Your Continent Grow? Data from ancient mantle rocks are helping to shore up the hypothesis that the continental crust was extracted in pulses, during periodic large melting events in the mantle. |
Chemistry World August 28, 2015 Andy Extance |
'Fire fountain' data illuminate lunar history The most precise measurements yet of carbon present in volcanic glass samples found on the Moon suggest that the 'fire fountain' lava explosions that formed them were propelled by carbon monoxide. |
Geotimes September 2007 Nicole Branan |
Understanding the Crust Beneath Iran The most recent continent-continent collision on Earth began about 10 to 20 million years ago when the Arabian Plate slammed into Eurasia in what is modern-day Iran. An international team of researchers has brought to light an important piece of this ancient history. |
Geotimes July 2007 Carolyn Gramling |
X-ray Eyes in the Sky Scientists are working on the next generation of low-orbiting satellites that they hope will see far past the Earth's surface and into its interior, to better understand the structure and composition of Earth's crust, mantle and core. |
Geotimes July 2004 Megan Sever |
Volcanic Avalanches New research suggests that shallow groundwater systems on volcanoes could explain deep edifice collapses. |
Chemistry World May 11, 2006 Jon Evans |
Sea Water Assumes the Xenon Mantle Geochemists have uncovered evidence that sea water incorporates noble gases into the Earth's mantle, overturning current theories of how noble gases are transported beneath the crust. |
Scientific American March 2005 Madhusree Mukerjee |
The Scarred Earth Tsunami-spawning quake leaves geophysical changes. |
Geotimes March 2005 Jay Chapman |
Hiking Nicaragua's Volcanoes Day trips from the major cities make it possible to see Nicaragua's best geologic features -- its volcanoes -- which are evenly spaced across the countryside. |
Chemistry World March 13, 2014 Emma Stoye |
Piece of Earth's interior 'ocean' found in diamond A tiny crystal found in a diamond has confirmed predictions about a giant store of water deep in the Earth's mantle. |
Geotimes November 2003 Naomi Lubick |
Turkish tectonics Researchers recently published preliminary results of the first data collected with modern techniques documenting the tectonic and seismic regimes of eastern Turkey. Their work may overturn conceptions of the tectonic setting of the region. |
Geotimes January 2007 Nicole Branan |
Heat Flow Causes Magnetic Reversals Earth's magnetic field has done hundreds of somersaults over the last few billion years. A new study sheds some light on what causes the geomagnetic field to flip. |
Geotimes November 2007 Nicole Branan |
Volcanoes May Have Swallowed Early Earth's Oxygen New research suggests that early Earth did have oxygen during parts of the Archean (between 3.8 billion and 2.5 billion years ago), but volcanoes swallowed it up, thus preventing life from thriving. |
Geotimes July 2007 Kathryn Hansen |
Mars Had Explosive, Watery Past NASA's Mars rover Spirit hit a grand slam this spring when it rolled across Home Plate, a plateau feature on Mars that revealed clues supporting an explosive past for the planet. |
Geotimes November 2007 Toulkeridis et al. |
When Volcanoes Threaten, Scientists Warn After multiple false alarms of volcanoes erupting, people may start to doubt the credibility of the alarms and not listen to them. Scientists need to better predict and communicate the dangers arising from living in the shadow of volcanoes. |
Chemistry World December 22, 2009 Rajendrani Mukhopadhyay |
SlipChip serves up protein crystals A simple microfluidic device requiring no pumps or valves can be used to screen for suitable protein crystallisation conditions, claim US researchers. |
Geotimes May 2006 Megan Sever |
Yellowstone's Moving Magma New research is suggesting that magma located below the Norris Geyser Basin in Yellowstone National Park periodically rises close to the surface, heating the geothermal field, before diving back down. |
Geotimes October 2004 Pratt & Lubick |
Mount St. Helens Could Erupt in Days to Months In the next few days to a month, there's a 70 percent chance that a small to moderate eruption event will happen at Mount St. Helens, site of the violent and deadly eruption of May 18, 1980. |